As a cost effective replacement or a precautionary replacement to avoid the potential failure we produce this silicone reinforced hose. The 225/210 hp 1.8T engines as fitted in the MK1 Audi TT, Seat Leon Cupra R and Audi S3 have a organic rubber hose on the intake manifold that feeds the brake vacuum system. This hose is prone to failure leading not only to a loss of engine power but also brake efficiency. The OEM replacement is only available with the hard pipes included, which incurs considerable unnecessary expense. The Forge silicone hoses in this kit have been designed to include an expensive inner liner of modified silicone known as Fluorosilicone. This means the hoses are suitable to be used with either modern long-life coolants, Organic Acid Technology coolants (O.A.T.) or air containing oil mist. The construction of the hoses has been engineered to exceed that of the OEM fitments, and will enhance any engine bay both technically and aesthetically The use of a Fluorosilicone liner ensures that Forge silicone hoses are the clear market leader. Lifetime warranty* All Forge Motorsport products come with a limited lifetime warranty. All warranty claims must be accompanied by the original proof of purchase to enable us to help you. Failure to supply this proof will result in your claim or enquiry being denied.